scholarly journals Inorganic Doped Dl-Polylactide Polyaniline Based Composite for Methane (Ch4) Gas Sensing

2021 ◽  
pp. 191-201
Author(s):  
Muktikanta Panigrahi ◽  
◽  
Basudam Adhikari ◽  
Keyword(s):  
Composite Film ◽  
Electronic Transition ◽  
Gas Sensing ◽  
Chemical Oxidation ◽  
Methane Gas ◽  
Chemical Oxidation Polymerization ◽  
Uv Visible ◽  
Chemical Groups ◽  
Gas Response ◽  
Polymerization Method

Polyaniline (PANI) nonofibriles have been successfully synthesised by simple chemical-oxidation polymerization method using aniline as a predecessor at room temperature. It was synthesized using H3PO4 dopants. The structure, chemical groups, and electronic transition were investigated by SEM, FTIR, and UV Visible. We present the methane gas response of as-prepared H3PO4 doped DL−PLA/PANI-ES composite film at different concentration. The percentage (%) methane gas response was found to be 9 % at 500ppm.

Enhanced cycling stability of silicon anode by in situ polymerization of poly(aniline-co-pyrrole)

RSC Advances ◽  
2014 ◽  
Vol 4 (96) ◽  
pp. 54134-54139 ◽  
Author(s):  
Qingtao Wang ◽  
Ruirong Li ◽  
Dong Yu ◽  
Xiaozhong Zhou ◽  
Jian Li ◽  
...  
Keyword(s):  
Anode Material ◽  
In Situ Polymerization ◽  
Chemical Oxidation ◽  
Silicon Anode ◽  
Composite Anode ◽  
Chemical Oxidation Polymerization ◽  
Si Nanoparticles ◽  
Polymerization Method ◽  
Poly Aniline

Poly(aniline-co-pyrrole)-encapsulated Si nanoparticles composite anode material were prepared by an in situ chemical oxidation polymerization method.

scholarly journals Polythiophene coated aromatic polyimide enabled ultrafast and sustainable lithium ion batteries

2017 ◽  
Vol 5 (46) ◽  
pp. 24083-24090 ◽  
Author(s):  
Hailong Lyu ◽  
Jiurong Liu ◽  
Shannon Mahurin ◽  
Sheng Dai ◽  
Zhanhu Guo ◽  
...  
Keyword(s):  
Composite Electrode ◽  
Electrode Materials ◽  
High Capacity ◽  
Lithium Ion ◽  
Chemical Oxidation ◽  
High Rate ◽  
Aromatic Polyimide ◽  
Chemical Oxidation Polymerization ◽  
Polymerization Method

Organic composite electrode materials based on aromatic polyimide (PI) and electron conductive polythiophene (PT) have been prepared by a facile in situ chemical oxidation polymerization method. The optimized composite electrode PI30PT delivers a remarkable high-rate cyclability, achieving a high capacity of 89.6 mA h g−1 at 20 C with capacity retention of 94% after 1000 cycles.

scholarly journals High Crystalline Quality Conductive Polypyrrole Film Prepared by Interface Chemical Oxidation Polymerization Method

2021 ◽  
Vol 12 (1) ◽  
pp. 58
Author(s):  
Yuefei Wang ◽  
Renjing Song ◽  
Li Li ◽  
Rongpeng Fu ◽  
Zhiguo Liu ◽  
...  
Keyword(s):  
Chemical Oxidation ◽  
Crystalline Quality ◽  
Large Area ◽  
High Crystalline Quality ◽  
Xrd Diffraction ◽  
Chemical Oxidation Polymerization ◽  
Polypyrrole Film ◽  
High Degree ◽  
Polymerization Method ◽  
Degree Of Order

The authors report that polypyrrole (PPy) films with large area and high crystalline quality have been achieved using an interfacial chemical oxidation method. By dissolving different reactants in two immiscible solvents, the PPy is synthetized at the interface region of the two solutions. The PPy films have sharp XRD diffraction peaks, indicating that the molecular chains in the film are arranged in a high degree of order and that they reflect high crystalline quality. High crystal quality is also conducive to improving electrical conductivity. The conductivity of the as prepared PPy film is about 0.3 S/cm, and the carrier mobility is about 5 cm2/(Vs). In addition, the biggest advantage of this method is that the prepared PPy film has a large area and is easy to transfer to other substrates. This will confidently broaden the application of PPy in the future.

Low-Working-Temperature and High-NO2-Sensing Properties of SnO2/PANI Hybrid Material Sensors

2017 ◽  
Vol 727 ◽  
pp. 503-507
Author(s):  
Hong Yan Xu ◽  
Teng Teng Wu ◽  
Wen Ru Li ◽  
Huan Qin Yu ◽  
Ting Zhai ◽  
...  
Keyword(s):  
Thick Film ◽  
Gas Sensors ◽  
Gas Sensing ◽  
High Sensitivity ◽  
Ethanol Vapor ◽  
Chemical Oxidation ◽  
Sensing Properties ◽  
Operation Temperature ◽  
Chemical Oxidation Polymerization ◽  
Press Method

In this work, SnO2 porous nanosolids were obtained from SnO2 nanopowders by using a solvo-thermal hot-press method. Then, by using the conventional thick-film sensors preparation technology, SnO2 porous thick-film gas sensor was prepared from it. Meanwhile, polyaniline (PANI) was synthesized by chemical oxidation polymerization. After that, by mechanical method, the SnO2/PANI composite gas sensors were fabricated. The intrinsic resistances and gas sensing properties of sensors to NO2, NH3, H2 and ethanol vapor were tested. Compared with the SnO2 porous gas sensors, the optimum operation temperature of SnO2/PANI hybrid gas sensors decreased dramatically. And SnO2/PANI hybrid gas sensors showed satisfying selectivity and high sensitivity for NO2.

scholarly journals Preparation of PANI Modified ZnO Composites via Different Methods: Structural, Morphological and Photocatalytic Properties

Water ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1025
Author(s):  
Nazli Turkten ◽  
Yunus Karatas ◽  
Miray Bekbolet
Keyword(s):  
Raman Spectroscopy ◽  
Chemical Oxidation ◽  
Emeraldine Base ◽  
Hybridization Method ◽  
X Ray ◽  
In Situ Chemical Oxidation ◽  
Chemical Oxidation Polymerization ◽  
Ft Ir ◽  
Polymerization Method

Polyaniline modified zinc oxide (PANI-ZnO) photocatalyst composites were synthesized by focusing on dissolution disadvantage of ZnO. In-situ chemical oxidation polymerization method was performed under neutral conditions (PANI-ES) whereas in hybridization method physical blending was applied using emeraldine base of polyaniline (PANI-EB). PANI-ZnO composites were prepared in various ratios of aniline (ANI) to ZnO as 1%, 3%, 6% and 9%. The alterations on the structural and morphological properties of PANI-ZnO composites were compared by Fourier Transform Infrared (FT-IR), Raman Spectroscopy, X-Ray Diffraction (XRD) and Scanning Electron Microscopy-Energy Dispersive X-ray Analysis Unit (SEM-EDAX) techniques. FT-IR and Raman spectroscopy confirmed the presence of PANI in all composites. SEM images revealed the morphological differences of PANI-ZnO composites based on PANI presence and preparation methods. Photocatalytic performances of PANI-ZnO specimens were investigated by following the degradation of methylene blue (MB) in aqueous medium under UVA irradiation. The effects of catalyst dose and initial dye concentration were also studied. MB degradation was followed by both decolorization extents and removal of aromatic fractions. PANI-ZnO composites expressed enhanced photocatalytic performance (~95% for both methods) as compared to sole ZnO (~87%). The hybridization method was found to be more efficient than the in-situ chemical oxidation polymerization method emphasizing the significance of the neutral medium.

scholarly journals Enhanced electromagnetic wave absorption of engineered epoxy nanocomposites with the assistance of polyaniline fillers

2022 ◽  
Author(s):  
Jiang Guo ◽  
Zhuoran Chen ◽  
Xiaojian Xu ◽  
Xu Li ◽  
Hu Liu ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Electromagnetic Wave ◽  
Chemical Oxidation ◽  
X Ray Diffraction ◽  
Epoxy Nanocomposites ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption ◽  
Chemical Oxidation Polymerization ◽  
Absorption Performance ◽  
Polymerization Method

AbstractIn this work, the engineered polyaniline (PANI)/epoxy composites reinforced with PANI-M (physical mixture of PANI spheres and fibers) exhibit significantly enhanced electromagnetic wave absorption performance and mechanical property. Due to the synergistic effect of PANI fillers with different geometries, the reflection loss of 10.0 wt% PANI-M/epoxy could reach − 36.8 dB at 17.7 GHz. Meanwhile, the mechanical properties (including tensile strength, toughness, and flexural strength) of PANI/epoxy were systematically studied. Compared with pure epoxy, the tensile strength of epoxy with 2.0 wt% PANI-M was improved to 86.2 MPa. Moreover, the PANI spheres (PANI-S) and PANI fibers (PANI-F) were prepared by the chemical oxidation polymerization method and interface polymerization method, respectively. The characterizations including scanning electron microscope, Fourier transform infrared spectra, and X-ray diffraction were applied to analyze the morphology and chemical and crystal structures of PANI filler. This work could provide the guideline for the preparation of advanced engineered epoxy nanocomposites for electromagnetic wave pollution treatment. Graphical abstract

Gas-sensing characteristics of dielectrophoretically assembled composite film of oxygen plasma-treated SWCNTs and PEDOT/PSS polymer

2013 ◽  
Vol 178 ◽  
pp. 279-288 ◽  
Author(s):  
Jinming Jian ◽  
Xishan Guo ◽  
Liwei Lin ◽  
Qiang Cai ◽  
Jie Cheng ◽  
...  
Keyword(s):  
Composite Film ◽  
Oxygen Plasma ◽  
Gas Sensing ◽  
Sensing Characteristics

Star-Fruit-Shaped CuO Structures for High Performance Ethanol Gas Sensor Device

2021 ◽  
Vol 13 (4) ◽  
pp. 724-733
Author(s):  
Ahmad Umar ◽  
Ahmed A. Ibrahim ◽  
Rajesh Kumar ◽  
Hassan Algadi ◽  
Hasan Albargi ◽  
...  
Keyword(s):  
Gas Sensor ◽  
High Performance ◽  
Crystal Size ◽  
Gas Sensing ◽  
Sensor Applications ◽  
Sensor Device ◽  
Star Fruit ◽  
Micro Structures ◽  
Gas Response ◽  
Structural Crystal

In this paper, star-fruit-shaped CuO microstructures were hydrothermally synthesized and subsequently characterized through different techniques to understand morphological, compositional, structural, crystal, optical and vibrational properties. The formation of star-fruit-shaped structures along with some polygonal and spherical nanostructures was confirmed by FESEM analysis. XRD data and Raman spectrum confirmed the monoclinic tenorite crystalline phase of the CuO with crystal size 17.61 nm. Star-fruit-shaped CuO microstructures were examined for ethanol gas sensing behavior at various operating temperatures and concentrations. The gas response of 135% was observed at the optimal temperature of 225 °C. Due to excellent selectivity, stability and re-usability, the as-fabricated sensor based on star-fruit-shaped CuO micro-structures may be explored for future toxic gas sensor applications.

Removal of hexavalent chromium from aqueous solution using exfoliated polyaniline/montmorillonite composite

2014 ◽  
Vol 70 (4) ◽  
pp. 678-684 ◽  
Author(s):  
Jun Chen ◽  
Xiaoqin Hong ◽  
Yongteng Zhao ◽  
Qianfeng Zhang
Keyword(s):  
Adsorption Capacity ◽  
Chemical Oxidation ◽  
Maximum Adsorption Capacity ◽  
Isothermal Model ◽  
Adsorption Characteristic ◽  
In Situ Chemical Oxidation ◽  
Acid Copolymer ◽  
Chemical Oxidation Polymerization ◽  
Effects Of Ph ◽  
Pseudo Second Order

Exfoliated polyaniline/montmorillonite (PANI/MMT) composites with nanosheet structure were successfully prepared by in situ chemical oxidation polymerization with MMT platelets as the scaffold. Amphoteric polymer, (2-methacryloyloxyethyl)trimethyl ammonium chloride and methacrylate acid copolymer, was used to modify montmorillonite and a large number of carboxylic acids were introduced on the surface of the clay platelets, which can be used as a dopant of PANI and play a ‘bridge’ role to combine PANI with clay. Adsorption experiments were carried out to study the effects of pH, contact time, Cr(VI) concentration, adsorbent dose and temperature. The adsorption of Cr(VI) on the PANI/MMT was highly pH dependent and the adsorption kinetics followed a pseudo-second-order model. The Langmuir isothermal model described the adsorption isotherm data well and the maximum adsorption capacity increased with the increase in temperature. Thermodynamic investigation indicated that the adsorption process is spontaneous, endothermic and marked with an increase in randomness at the adsorbent – liquid interface. The maximum adsorption capacity of the PANI/MMT composites for Cr(VI) was 308.6 mg/g at 25 °C. The excellent adsorption characteristic of exfoliated PANI/MMT composites will render it a highly efficient and economically viable adsorbent for Cr(VI) removal.

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